Classification of Region of Interest in Mammograms Using Dual Contourlet Transform and Improved KNN

Table 5

Classification performance (%) using KNN and improved KNN tested between benign and malignant.

Feature	Dual-CT		Contourlet		Wavelet
	Benign	Malignant	Benign	Malignant	Benign	Malignant
KNN (mean)	84.85	65.38	80.38	76.92	87.88	73.08
Improved KNN (mean)	98.48	82.69	95.45	86.54	93.94	78.85
KNN (SD)	87.88	61.54	77.27	63.46	83.33	65.38
Improved KNN (SD)	100	84.62	89.39	86.54	90.91	78.85
KNN (smoothness)	75.76	63.46	83.33	69.23	87.88	65.38
Improved KNN (smoothness)	96.97	94.23	95.45	80.77	89.39	75.00
KNN (skewness)	81.82	59.62	80.30	75.00	77.27	73.08
Improved KNN (skewness)	93.94	86.54	89.39	82.69	87.88	86.54
KNN (uniformity)	83.33	65.38	78.79	69.23	89.39	61.54
Improved KNN (uniformity)	98.48	90.38	95.45	80.77	92.42	73.08
KNN (entropy)	72.73	61.54	83.33	71.15	89.39	59.62
Improved KNN (entropy)	93.94	86.54	93.94	82.69	96.97	73.68
KNN (contrast)	80.30	69.23	84.85	63.46	78.79	63.46
Improved KNN (contrast)	95.45	96.15	92.42	80.77	92.42	78.85
KNN (correlation)	77.27	75.00	83.33	73.08	81.82	78.85
Improved KNN (correlation)	93.94	88.46	95.45	75.00	89.39	82.69
KNN (homogeneity)	74.24	78.85	80.30	63.46	81.82	61.54
Improved KNN (homogeneity)	95.45	94.23	92.42	82.69	87.88	73.08

SD represents standard deviation; bold font number indicates the best performance in each class.